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Advances in Numerical Ditching Simulation of Flexible Aircraft Models

Siemann, Martin and Schwinn, Dominik and Scherer, Julian and Kohlgrüber, Dieter (2017) Advances in Numerical Ditching Simulation of Flexible Aircraft Models. International Journal of Crashworthiness. Taylor & Francis. doi: 10.1080/13588265.2017.1359462. ISSN 1358-8265.

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This paper deals with explicit numerical simulation of fixed-wing aircraft ditching using a coupled approach of Smoothed Particle Hydrodynamics and Finite Elements. Particular focus is put on recent advances toward simulation of flexible full aircraft models, which comprises significant challenges with respect to the numerical efficiency as well as the model complexity. First, the pursued numerical approach is briefly presented. In order to deal with aforementioned challenges, an automated modular tool, which generates numerical models and launches ditching simulations, is presented. The paper provides a brief explanation of state-of-the-art aircraft as well as fluid modelling techniques used and furthermore presents an integrated model that computes aerodynamic loads during the simulation. The developed tool is used to conduct various numerical studies. First, the improved efficiency of such simulations over the state of the art is shown. Next, results of parameter studies are presented, demonstrating the effects of impact conditions on the aircraft motion. Finally, the structural deformation experienced during ditching of a detailed finite element aircraft model is analysed and its effects on the aircraft motion are discussed.

Item URL in elib:https://elib.dlr.de/113766/
Document Type:Article
Title:Advances in Numerical Ditching Simulation of Flexible Aircraft Models
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Siemann, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-7213-0715
Schwinn, DominikUNSPECIFIEDhttps://orcid.org/0000-0003-2341-9632
Scherer, JulianUNSPECIFIEDhttps://orcid.org/0000-0002-8054-4686
Kohlgrüber, DieterUNSPECIFIEDhttps://orcid.org/0000-0002-6626-0927
Journal or Publication Title:International Journal of Crashworthiness
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Taylor & Francis
Keywords:Aircraft ditching; Explicit numerical simulation; Fluid-structure interaction; SPH-FE approach; Structural flexibility; Process chain
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Siemann, Dr. Martin
Deposited On:11 Dec 2017 11:41
Last Modified:06 Sep 2019 15:18

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